Proc {}.arity is zero

Ruby Development
1

e$B0J2<$N$h$&$Ke(B proc {}.arity e$B$,e(B 0 e$B$K$J$j$^$9!#e(B

% ./ruby -ve ‘p proc {}.arity’
ruby 1.9.0 (2008-05-12 revision 16397) [i686-linux]
0

1.8 e$B$G$Oe(B -1 e$B$G$9!#e(B

% ruby-1.8 -ve ‘p proc {}.arity’
ruby 1.8.7 (2008-05-07 patchlevel 5000) [i686-linux]
-1

2

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:34669] proc {}.arity is zero”
on Tue, 13 May 2008 11:33:23 +0900, Tanaka A. [email protected]
writes:

|e$B0J2<$N$h$&$Ke(B proc {}.arity e$B$,e(B 0 e$B$K$J$j$^$9!#e(B
|
|% ./ruby -ve ‘p proc {}.arity’
|ruby 1.9.0 (2008-05-12 revision 16397) [i686-linux]
|0
|
|1.8 e$B$G$Oe(B -1 e$B$G$9!#e(B
|
|% ruby-1.8 -ve ‘p proc {}.arity’
|ruby 1.8.7 (2008-05-07 patchlevel 5000) [i686-linux]
|-1

1.8e$B$G$Oe(Bproc{}e$B$He(Bproc{||}e$B$O0c$&F0$-$r$9$k$s$G$9$h$M!#e(Bproc{}e$B$Ne(B
e$BJ}$Oe(Bproc{|*|}e$B$HF1$8$h$&$KF0:n$7$^$9!#%=!<%9$r8+$?8B$j$G$O!"e(B
YARVe$B$O$3$N$U$?$D$r6hJL$9$k>pJs$r<N$F$F$k$_$?$$!#e(B

e$B%Q!<%6$NJ}$Ge(Bproc{}e$B$re(Bproc{|*|}e$B$KE83+$9$k$H$$$&J}K!$b$“$j$($k$Ne(B
e$B$G$9$,!“LLE]$J3d$K$O$”$s$^$j0UL#$,$J$$$h$&$J5$$b$9$k$N$G!”$3e(B
e$B$l$Oe(B1.9e$B$G$NHs8_49$JE@$H$$$&$3$H$K$7$?J}$,NI$$$h$&$J5$$,$7$F$-e(B
e$B$^$7$?!#e(B

3

e$B@>;3OB9-$G$9!#e(B

At Wed, 14 May 2008 00:36:30 +0900,
Yukihiro M. wrote:

1.8e$B$G$Oe(Bproc{}e$B$He(Bproc{||}e$B$O0c$&F0$-$r$9$k$s$G$9$h$M!#e(Bproc{}e$B$Ne(B
e$BJ}$Oe(Bproc{|*|}e$B$HF1$8$h$&$KF0:n$7$^$9!#%=!<%9$r8+$?8B$j$G$O!"e(B
YARVe$B$O$3$N$U$?$D$r6hJL$9$k>pJs$r<N$F$F$k$_$?$$!#e(B

1.8e$B$Ne(Bproc{}e$B$He(Bproc{||}e$B$KBP1~$9$k$N$Oe(B1.9e$B$Ne(Bproc{}e$B$He(Blambda{}e$B$N$h$&$Ke(B
e$B$_$($k$N$G!"e(Bproc{}.aritye$B$Oe(B-1e$B$K$J$C$F$[$7$$5$$,$7$^$9!#e(B